Relocate bottles using install_name_tool.

This has two parts:

1. Bottles are temporarily relocated on bottling and tested if that is
sufficient for them to contain no longer reference the prefix or
cellar. If so, they are marked as relocatable.
2. On installation if bottles are marked as relocatable they will be
relocated using install_name_tool to the current prefix and cellar.

Closes Homebrew/homebrew#18374.

1 files changed, 13 insertions, 2 deletions

diff --git a/Library/Homebrew/formula_installer.rb b/Library/Homebrew/formula_installer.rb
index 9251fe487..767db6e63 100644
--- a/Library/Homebrew/formula_installer.rb
+++ b/Library/Homebrew/formula_installer.rb
@@ -96,13 +96,13 @@ class FormulaInstaller
     begin
       if pour_bottle?
         pour
-        poured_bottle = true
+        @poured_bottle = true
       end
     rescue
       opoo "Bottle installation failed: building from source."
     end
 
-    unless poured_bottle
+    unless @poured_bottle
       build
       clean
     end
@@ -353,6 +353,17 @@ class FormulaInstaller
 
   def fix_install_names
     Keg.new(f.prefix).fix_install_names
+    if @poured_bottle
+      old_prefix = f.bottle.prefix
+      new_prefix = HOMEBREW_PREFIX.to_s
+      old_cellar = f.bottle.cellar
+      new_cellar = HOMEBREW_CELLAR.to_s
+
+      if old_prefix != new_prefix or old_cellar != new_cellar
+        Keg.new(f.prefix).relocate_install_names \
+          old_prefix, new_prefix, old_cellar, new_cellar
+      end
+    end
   rescue Exception => e
     onoe "Failed to fix install names"
     puts "The formula built, but you may encounter issues using it or linking other"